EP3502551B1 - Dispositif d'éclairage pour véhicules - Google Patents

Dispositif d'éclairage pour véhicules Download PDF

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Publication number
EP3502551B1
EP3502551B1 EP18213691.1A EP18213691A EP3502551B1 EP 3502551 B1 EP3502551 B1 EP 3502551B1 EP 18213691 A EP18213691 A EP 18213691A EP 3502551 B1 EP3502551 B1 EP 3502551B1
Authority
EP
European Patent Office
Prior art keywords
light
block
lighting device
material normally
face
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP18213691.1A
Other languages
German (de)
English (en)
Other versions
EP3502551A1 (fr
Inventor
Piero LOVATO
Stéphanie RENARD
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marelli Automotive Lighting Italy SpA
Original Assignee
Marelli Automotive Lighting Italy SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Marelli Automotive Lighting Italy SpA filed Critical Marelli Automotive Lighting Italy SpA
Publication of EP3502551A1 publication Critical patent/EP3502551A1/fr
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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0028—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed refractive and reflective surfaces, e.g. non-imaging catadioptric systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/322—Optical layout thereof the reflector using total internal reflection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/63—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates
    • F21S41/635—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by moving refractors, filters or transparent cover plates
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED

Definitions

  • the present invention relates to a lighting device for vehicles, which also offers considerable versatile use, in addition to high performance and compactness.
  • the object of the present invention is to provide a lighting device for vehicles, which is compact, simple and cheap to produce, which allows the use of additional reflecting elements to be avoided or limited, such as, for example, reflecting or shielding elements and, in particular, which is versatile, being able to be used to achieve different functions or parts thereof, for example, dazzling beam or HB (High Beam), dipped beam or LB (Low Beam), fog light, only with slight modifications to a limited number of components.
  • additional reflecting elements such as, for example, reflecting or shielding elements and, in particular, which is versatile, being able to be used to achieve different functions or parts thereof, for example, dazzling beam or HB (High Beam), dipped beam or LB (Low Beam), fog light, only with slight modifications to a limited number of components.
  • a lighting device for vehicles is globally indicated with 1, comprising at least one LED light source 2 and an optical system 3 for collecting and distributing, according to a desired photometric profile, known and not illustrated for simplicity, the light produced by the LED light source 2 forming, exiting the lighting device 1, a shaped light beam 4, controlled both horizontally and vertically.
  • the LED light source 2 can be any known LED light source, provided with a single LED or a plurality of LEDs arranged according to a matrix, for example side by side in a single row, mounted on a printed circuit board.
  • the optical system 3 comprises a light guide 5 formed by a block 6 of material normally pervious to light, for example, made as a solid and isotropic block of a polycarbonate, plexiglass and/or glass.
  • the block 6 of material normally pervious to light is shaped in order to define a solid wedge-shaped three-dimensional element, delimited among an upper face 7 thereof, a lower face 8 thereof, opposed to the face 7 and facing thereto, two opposite lateral surfaces 9 thereof, preferably symmetrical and of which only one is clearly visible in the appended drawing, one or more front face 10 thereof and one or more rear face 11 thereof, in the sense that in the illustrated, non-limiting example a single front face 10 and a single rear face 11 are present, but these could be made as multifaceted surfaces, thus composed each of several adjacent faces, angled among one another.
  • the front face/s 10 defines/define a first longitudinal end 12 of the wedge-shaped block 6 of material normally pervious to light, while the rear face/s 11 defines/define a second longitudinal end 13 thereof, opposed to the longitudinal end 12.
  • the lateral surfaces 9 are curved and converge towards each other on the side of the second longitudinal end 13, so that the block 6 of material normally pervious to light widens, fanning out towards the first end 12; furthermore, the opposite curved lateral surfaces 9 are configured to cause a total (or at least partial) internal reflection of the light within the block 6 of material normally pervious to light.
  • the curved lateral surfaces 9 are configured to form curved reflectors adapted to control, mainly horizontally, i.e. preferably in a significantly horizontal direction, the light beam 4 exiting the device 1; specifically, as will be seen in greater detail below, the light beam 4 is formed, in the illustrated example, by the front face/s 10 and it is emitted thereby or therethrough outside of the block 6 of material normally pervious to light, at the front, on the side of the longitudinal end 12.
  • the rear face/s 11 is/are arranged facing the LED light source 2 and is/are provided with (or they define among one another) a concavity 14, which surrounds, at least partially, the LED light source 2 and which is delimited by a first, arc-shaped curved surface 15.
  • the curved surface 15 is made as a surface configured to collect and shape at least part of the light emitted by the LED light source 2 and inject it in the light guide 5 formed by the block 6 of material normally pervious to light.
  • the block 6 of material normally pervious to light is crossed by at least one perforation 16, which is through (as in the illustrated non-limiting example) or blind, or, according to possible variations not illustrated for simplicity, by several through (or blind) perforations 16, made transversally, preferably perpendicularly to the upper 7 and lower faces 8 of the block 6 of material normally pervious to light;
  • the at least one perforation 16 is interposed between the front face/s 10 and the at least one rear face/s 11 and it is delimited internally by a first optical surface 17 arranged facing the front face/s 10 and by a second optical surface 18 arranged facing the rear face/s 11.
  • the perforation 16 is configured to define an air lens interposed between the concavity 14 of the rear face/s 11 and the front face/s 10 and which shapes the light beam 4 between the concavity 14 of the rear face 11 and the front face 10.
  • the front face 10 is then defined, according to a further aspect of the invention, by a second curved surface 19, configured to collect the light from the inside of the block 6 of material normally pervious to light, to form and emit, outside of the same, the shaped light beam 4, which is controlled at least vertically (not necessarily in only one direction) by the conformation, in particular, by the curvature, of the surface 19.
  • the second curved surface 19 is a general optical surface dedicated to the formation of the light beam and can generally be curved in several directions.
  • the curvature of the surface 19 can thus be simple, for example, defined by an ellipse section, a parabola section, etcetera, or complex, being defined by a plurality of stretches of conics differing by equation and/or type joined to one another with continuity (in the first or second order) or not.
  • the second curved surface 19 is defined by the rectilinear translation of at least one curve transversally to the opposite lateral surfaces 9.
  • the upper face 7 and the lower face 8 are substantially flat and they are not made parallel to each other.
  • one of the two upper 7 and lower faces 8, or both is/are arranged obliquely with respect to a horizontal plane, for example, inclined by one same or a different angle ⁇ , so that both the upper and lower faces 7, 8, converge towards each other on the side of the second longitudinal end 13, causing a progressive decrease of a thickness, measured vertically, of the block 6 of material normally pervious to light towards the second longitudinal end 13 thereof.
  • both the upper and lower faces 7, 8, are made so that they converge towards each other on the side of the first longitudinal end 12, causing a progressive decrease of a thickness, measured vertically, of the block 6 of material normally pervious to light towards the first longitudinal end 12 thereof.
  • the upper face 7 (and/or also the lower face 8, depending on the cases and/or specific lighting needs) is provided with a plurality of embossings 20, for example, prism-shaped, configured to selectively remove part of the light emitted by the LED light source 2 and collected from the curved surface 15, in order to define, exiting the front face 10, a light beam 4 provided with a light-dark demarcation line (also known as cut-off).
  • embossings 20 for example, prism-shaped, configured to selectively remove part of the light emitted by the LED light source 2 and collected from the curved surface 15, in order to define, exiting the front face 10, a light beam 4 provided with a light-dark demarcation line (also known as cut-off).
  • At least one of the optical surfaces 17, 18 is preferably convex and shaped as a continuous curved surface or as a stepped discontinuous surface formed by curved and/or rectilinear sections.
  • both optical surfaces 17, 18 can be concave and/or convex. Preferably, they are convex and, nonetheless, they are shaped so that the perforation 16 thins in the center/midpoint of the block 6 of material normally pervious to light and widens towards the curved lateral surfaces 9 of the latter. According to a possible variation, not shown for simplicity, the optical surfaces 17, 18 can both be concave and, in any case, they are shaped so that the perforation 16 widens in the center of the block 6 of material normally pervious to light and thins towards the curved lateral surfaces 9 of the latter.
  • the optical system 3 further comprises, besides the light guide 5, an actuator 21 (for example, formed by an electric motor) for rotating the light guide 5 about an axis A passing through the LED light source 2; the concavity 14 is also made so that the axis A also forms the axis of symmetry of the curved surface 15.
  • an actuator 21 for example, formed by an electric motor for rotating the light guide 5 about an axis A passing through the LED light source 2; the concavity 14 is also made so that the axis A also forms the axis of symmetry of the curved surface 15.
  • the axis A passing through the LED light source 2 is a substantially vertical axis, so that the actuator 21 can rotate the light guide 5, for example, on an angular arc limited by 30° horizontally, both to the right and to the left, in order to also make the light beam 4 rotate with respect to a vehicle provided with the lighting device 1, for example, to follow a curve, or especially in the case when the lighting device 1 is used as an auxiliary lighting device for a fixed traditional lighting device, such as a front headlamp, to locally increase, in different points, the lighting generated by the main headlamp.
  • the lighting device 1 is, in fact, preferably incorporated in a headlamp or a headlight of a vehicle 22, illustrated only schematically, comprising at least one lighting device 1 according to what has been illustrated thus far.
  • the lighting device 1 is housed inside a cup-shaped casing 23 and designed to be mounted on a vehicle, and a transparent cover 24 closes the cup-shaped casing 23 at the front; the lighting device 1 is visible through the transparent cover 24 from the outside and emits the light beam 4.
  • the invention also relates to a vehicle comprising a headlamp or headlight 22, preferably a couple of headlamps or headlights 22, which are symmetrical to each other, incorporating the lighting device 1 with one or more lighting devices of the same type as the device 1 or of a traditional type.
  • the light guide 5 includes and performs all of the (or at least most of the) optical functions requested of the device 1 and efficiently lends itself to collecting the light emitted both from a light source 2 provided with a single LED and from a light source 2 provided with a sequence of LEDS, which are aligned with one another, for example, along the axis A.
  • the light potentially not collected from the concavity 14 can be recovered by means of auxiliary reflectors arranged above or below the light guide 5.
  • Different optical functions can be obtained by producing the light guides 5 with standard external dimensions, which are substantially identical, but provided with surfaces 9, 15, 11 and 19, differing by type, curvature and dimensions, allowing the position and dimensions of all of the other components of the lighting device to be standardized.
  • a mobility for example, a horizontal mobility, of the light beam 4 generated by the device 1 without substantially losing part of the light emitted by the light source 2, allowing elevated efficiency to be maintained.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Planar Illumination Modules (AREA)

Claims (10)

  1. Dispositif d'éclairage (1) pour véhicules comprenant au moins une source de lumière à DEL (2) et un système optique (3) pour collecter et distribuer, selon un profil photométrique souhaité, la lumière produite par ladite source de lumière à DEL (2) ; le système optique (3) comprenant un guide de lumière (5) formé par un bloc (6) de matériau normalement perméable à la lumière ; dans lequel, en combinaison :
    i)- le bloc (6) de matériau normalement perméable à la lumière est façonné de manière à définir un élément solide tridimensionnel en forme de coin, délimité par une face supérieure (7) de celui-ci, une face inférieure (8) de celui-ci, deux surfaces latérales (9) opposées de celui-ci, au moins une face avant (10) de celui-ci définissant une première extrémité longitudinale (12) de celui-ci et au moins une face arrière (11) de celui-ci, définissant une seconde extrémité longitudinale (13) de celui-ci, opposée à la première extrémité longitudinale (12) ;
    ii)- les surfaces latérales (9) sont incurvées et convergent l'une vers l'autre sur le côté de ladite seconde extrémité longitudinale (13), de sorte que le bloc (6) de matériau normalement perméable à la lumière s'élargit en se déployant vers la première extrémité (12) ; lesdites surfaces latérales (9) incurvées opposées étant configurées de façon à provoquer une réflexion interne totale, ou au moins partielle, de la lumière à l'intérieur du bloc (6) de matériau normalement perméable à la lumière ;
    iii)- l'au moins une face arrière (11) est agencée en regard de ladite au moins une source de lumière à DEL (2) et est pourvue d'une concavité (14), ou la définit, qui entoure, au moins partiellement, ladite au moins une source de lumière à DEL (2) et qui est délimitée par une première surface incurvée (15) en forme d'arc configurée pour collecter au moins une partie de la lumière émise par ladite au moins une source de lumière à DEL (2) à l'intérieur du bloc (6) de matériau normalement perméable à la lumière ;
    iv)- le bloc (6) de matériau normalement perméable à la lumière est traversé par au moins une perforation (16) réalisée transversalement auxdites faces supérieure (7) et inférieure (8) et interposée entre la face avant (10) et la face arrière (11) ; l'au moins une perforation (16) étant délimitée de façon interne par une première surface optique (17) agencée en regard de la face avant (10), et par une seconde surface optique (18) agencée en regard de la face arrière (11), l'au moins une perforation (16) étant configurée pour définir une lentille pneumatique interposée entre la concavité (14) de l'au moins une face arrière (11) et l'au moins une face avant (10) ;
    caractérisé en ce que
    v)- la face supérieure (7) et/ou la face inférieure (8) est agencée obliquement par rapport à un plan horizontal, de sorte que les faces supérieure et inférieure convergent l'une vers l'autre
    soit
    vi)- sur le côté de ladite seconde extrémité longitudinale (13) provoquant une diminution progressive d'une épaisseur, mesurée verticalement, du bloc (6) de matériau normalement perméable à la lumière vers la seconde extrémité longitudinale (13) de celui-ci ;
    ou
    vii)- sur le côté de ladite première extrémité longitudinale (12) provoquant une diminution progressive d'une épaisseur, mesurée verticalement, du bloc (6) de matériau normalement perméable à la lumière vers la première extrémité longitudinale (12) de celui-ci.
  2. Dispositif d'éclairage selon la revendication 1, caractérisé en ce que l'au moins une face avant (10) est définie par une seconde surface incurvée (19) configurée pour collecter la lumière depuis l'intérieur du bloc (6) de matériau normalement perméable à la lumière, pour former et émettre à l'extérieur un faisceau lumineux façonné (4), contrôlé au moins dans une direction verticale.
  3. Dispositif d'éclairage selon l'une quelconque des revendications précédentes, caractérisé en ce que la face supérieure (7) et la face inférieure (8) sont sensiblement plates et non parallèles l'une à l'autre.
  4. Dispositif d'éclairage selon l'une quelconque des revendications précédentes, caractérisé en ce que la face supérieure (7) et/ou la face inférieure (8) est pourvue d'une pluralité de bosselages (20) configurés pour éliminer sélectivement une partie de la lumière émise par la source de lumière à DEL (2) et collectée depuis la première surface incurvée (15), afin de définir, à la sortie de la face avant (10), un faisceau lumineux (4) pourvu d'une coupure ou ligne de démarcation clair-sombre.
  5. Dispositif d'éclairage selon l'une quelconque des revendications précédentes, caractérisé en ce que lesdites surfaces latérales (9) incurvées opposées sont configurées pour former des réflecteurs incurvés adaptés pour contrôler, en particulier, horizontalement, un faisceau lumineux (4) sortant formé par la face avant (10) et émis par celle-ci à l'extérieur du bloc (6) de matériau normalement perméable à la lumière.
  6. Dispositif d'éclairage selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins une, ou les deux, desdites première et seconde surfaces optiques (17, 18) est convexe et/ou concave et façonnée sous la forme d'une surface incurvée continue ou d'une surface discontinue échelonnée formée par des sections rectilignes et/ou incurvées.
  7. Dispositif d'éclairage selon l'une quelconque des revendications précédentes, caractérisé en ce que les deux desdites première et seconde surfaces optiques (17, 18) sont façonnées de sorte que ladite au moins une perforation (16)
    - s'amincit dans le centre dudit bloc (6) de matériau normalement perméable à la lumière et s'élargit vers lesdites surfaces latérales (9) incurvées de ce dernier ; ou
    - s'élargit dans le centre dudit bloc (6) de matériau normalement perméable à la lumière et s'amincit vers lesdites surfaces latérales (9) incurvées de ce dernier.
  8. Dispositif d'éclairage selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit système optique (3) comprend un actionneur (21) pour faire tourner ledit guide de lumière (5) autour d'un axe (A) passant par ladite au moins une source de lumière à DEL (2) et constituant un axe de symétrie de ladite première surface incurvée (15) ; ledit axe (A) passant par ladite au moins une source de lumière à DEL (2) étant de préférence un axe sensiblement vertical.
  9. Projecteur ou phare d'un véhicule (22) caractérisé en ce qu'il comprend au moins un dispositif d'éclairage (1) selon l'une des revendications 1 à 8 logé dans un boîtier en forme de coupe (23) et conçu pour être monté sur un véhicule et une protection transparente (24), qui ferme le boîtier en forme de coupe sur le devant et à travers laquelle ledit dispositif d'éclairage (1) est visible depuis l'extérieur.
  10. Véhicule comprenant un projecteur ou un phare selon la revendication 9.
EP18213691.1A 2017-12-19 2018-12-18 Dispositif d'éclairage pour véhicules Active EP3502551B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT201700146578 2017-12-19

Publications (2)

Publication Number Publication Date
EP3502551A1 EP3502551A1 (fr) 2019-06-26
EP3502551B1 true EP3502551B1 (fr) 2020-08-12

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EP (1) EP3502551B1 (fr)
CN (1) CN109931571B (fr)

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Publication number Priority date Publication date Assignee Title
DE102019106221A1 (de) * 2019-03-12 2020-09-17 HELLA GmbH & Co. KGaA Beleuchtungsvorrichtung für Fahrzeuge
IT202100008909A1 (it) 2021-04-09 2022-10-09 Marelli Automotive Lighting Italy S P A Con Socio Unico Dispositivo di illuminazione per veicoli, in particolare a led
CN114353012B (zh) * 2021-12-29 2024-05-07 马瑞利汽车零部件(芜湖)有限公司 极窄开口可自由组合的车灯模组系统

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FR2905448B1 (fr) * 2006-09-01 2015-05-01 Valeo Vision Dispositif d'eclairage ou de signalisation d'aspect guide de lumiere haute performance pour vehicule.
JP5641332B2 (ja) * 2011-01-24 2014-12-17 スタンレー電気株式会社 灯具
JP5911397B2 (ja) * 2012-07-31 2016-04-27 スタンレー電気株式会社 車両用前照灯
DE102013212352A1 (de) * 2013-06-26 2014-12-31 Automotive Lighting Reutlingen Gmbh Kraftfahrzeugbeleuchtungseinrichtung mit einer Einkoppeloptik und einer Transport- und Umformoptik
FR3021606B1 (fr) * 2014-06-03 2016-05-27 Peugeot Citroen Automobiles Sa Dispositif d'eclairage a lentille mobile pour vehicule automobile
FR3022324B1 (fr) * 2014-06-16 2016-07-15 Valeo Vision Module d'eclairage et/ou de signalisation rotatif
US10139078B2 (en) * 2015-02-19 2018-11-27 Whelen Engineering Company, Inc. Compact optical assembly for LED light sources
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KR102352760B1 (ko) * 2016-03-21 2022-01-19 루미리즈 홀딩 비.브이. 조명 장치
FR3050010B1 (fr) * 2016-04-11 2018-04-27 Valeo Vision Module d'emission de lumiere compact, dispositif et projecteur associes pour vehicule automobile
FR3050797B1 (fr) * 2016-04-28 2019-11-29 Valeo Vision Module lumineux rotatif
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Publication number Publication date
EP3502551A1 (fr) 2019-06-26
CN109931571B (zh) 2022-07-01
CN109931571A (zh) 2019-06-25

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